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| author | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-09-18 20:19:38 +0000 |
|---|---|---|
| committer | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-09-18 20:19:38 +0000 |
| commit | 3cbda570c22f0324502a43dc668223b3da5d241b (patch) | |
| tree | 01a39613da904d9358d63140eef7e17cae8ccbc7 /test/bigdecimal/test_bigdecimal.rb | |
| parent | 9dffbcfc09dc54d77bfb99dc91e0c5ea01182925 (diff) | |
| download | ruby-3cbda570c22f0324502a43dc668223b3da5d241b.tar.gz | |
* ext/bigdecimal/bigdecimal.c: fix rounding algorithms for half-down
and half-even. This change is based on the patch created by Matthew
Willson, the reporter of this bug. [Bug #3803] [ruby-core:32136]
* test/bigdecimal/test_bigdecimal.rb: add tests for above changes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29293 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/bigdecimal/test_bigdecimal.rb')
| -rw-r--r-- | test/bigdecimal/test_bigdecimal.rb | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb index 02a067a810..2efa65b57b 100644 --- a/test/bigdecimal/test_bigdecimal.rb +++ b/test/bigdecimal/test_bigdecimal.rb @@ -612,6 +612,18 @@ class TestBigDecimal < Test::Unit::TestCase assert_equal(3, x.round(0, BigDecimal::ROUND_CEILING)) assert_equal(2, x.round(0, BigDecimal::ROUND_FLOOR)) assert_raise(TypeError) { x.round(0, 256) } + + 15.times do |n| + x = BigDecimal.new("5#{'0'*n}1") + assert_equal(10**(n+2), x.round(-(n+2), BigDecimal::ROUND_HALF_DOWN)) + assert_equal(10**(n+2), x.round(-(n+2), BigDecimal::ROUND_HALF_EVEN)) + x = BigDecimal.new("0.5#{'0'*n}1") + assert_equal(1, x.round(0, BigDecimal::ROUND_HALF_DOWN)) + assert_equal(1, x.round(0, BigDecimal::ROUND_HALF_EVEN)) + x = BigDecimal.new("-0.5#{'0'*n}1") + assert_equal(-1, x.round(0, BigDecimal::ROUND_HALF_DOWN)) + assert_equal(-1, x.round(0, BigDecimal::ROUND_HALF_EVEN)) + end end def test_truncate |